Episode 3. Just a reminder: Last week, this newest Star Trek spinoff premiered on CBS, then immediately shifted gears by making the second episode available exclusively on its new streaming subscription service, CBS All Access. All other new episodes of Star Trek: Discovery will appear exclusively on CBS All Access, premiering Sundays at 8:30 p.m. ET – as with tonight’s scheduled unveiling of episode three. Sonequa Martin-Green stars as First Officer Michael Burnham – and long-time Trek fans should pay careful attention to what’s on her desk in the accompanying photo from this episode. That’s right, Trekkies – it’s a Tribble!